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Cogent Communications to Start Providing Earnings Guidance

WASHINGTON, D.C., February 15, 2005 - Cogent Communications Group, Inc. (AMEX: COI), a leading facilities-based provider of low-cost, high speed Internet access and Internet Protocol Communications services, today announced that it is initiating scheduled quarterly issuances of earnings releases, beginning with the first fiscal quarter of 2005. Each quarterly press release will discuss the company's earnings and other financial data for the recently completed quarter and will include guidance for future periods. Such guidance will supplement existing guidance and be based on management's assumptions regarding future prospects and as such, is subject to certain risks and uncertainties, all of which are discussed in greater detail in our registration statement filed on Form S-1. The first earnings release is currently scheduled to be issued on May 11. In addition to the scheduled press releases, Cogent will be instituting regular conference calls to discuss its earnings.

About Cogent Communications

Cogent Communications (AMEX: COI) is a multinational, Tier 1 facilities-based ISP that specializes in providing businesses with high speed Internet access and point-to-point transport services. Cogent's facilities-based, all-optical IP network backbone spans 11 countries and provides IP services in markets located in North America and Europe.

Since Cogent's inception, Cogent has exploited the benefits that IP technology provides, building one of the largest and highest capacity IP networks in existence. This network enables Cogent to offer large bandwidth connections at highly competitive prices. Network ownership also enables Cogent to offer superior customer support through the ability to control service delivery and network monitoring end-to-end.

Cogent Communications is headquartered at 1015 31st Street, NW, Washington, D.C. 20007. For more information, visit www.cogentco.com. Cogent Communications can be reached in the United States at (202) 295-4200 or via email at This email address is being protected from spambots. You need JavaScript enabled to view it..

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Information in this release may involve expectations, beliefs, plans, intentions or strategies regarding the future. These forward-looking statements involve risks and uncertainties. All forward-looking statements included in this release are based upon information available to Cogent Communications Group, Inc. as of the date of the release, and we assume no obligation to update any such forward-looking statement. The statements in this release are not guarantees of future performance and actual results could differ materially from our current expectations. Numerous factors could cause or contribute to such differences. Some of the factors and risks associated with our business are discussed in Cogent's registration statements filed with the Securities and Exchange Commission and in its other reports filed from time to time with the SEC.

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Cogent Communications

Cogent is one of the world's largest Internet Service Providers, delivering high quality Internet, Ethernet and Colocation services to over 66,980 Enterprise and NetCentric customers. Cogent serves over 198 markets in 41 countries across its facilities-based, all-optical IP network.

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